Casing for x-ray apparatus



Dec. 24, 1935. H, F. wAlTE CASING FOR X-RAY APPARATUS Filed July 5l, 1935 Patented Dec. 24, 1935 UNITED STATES PATENT OFFICE This invention relates to casings for X-ray apparatus and particularly to those which contain f oil-immersed parts of the X-ray circuit, such as for example, the X-ray tube, transformers, etc.

The object of the invention is to provide a casing of this character containing X-ray apparatus particularly adapted for dental work, the casing being mounted in suitable supporting means to permit of its being pivotally moved to the various angles required toy enable the apparatus to be properly used. The casing is so vsupported that all wiring leading into it is effectively protected and concealed and the use of wiping or other movable electrical contacts, generally used where a relative movement is had between electrical parts and a support are wholly dispensed with. The casing is also so constructed that a liquid-tight container is provided and leakage of oil out of the casing is effectively prevented.

Reference is to be had to the accompanying drawing in which Fig. 1 is a vertical sectional view through the casing, a part of the supporting yoke therefor being shown partly in section; Fig, 2 is a sectional view through the casing, the view being taken at right angles to that of Fig. l; Fig. 3 is an end View of the casing and supporting yoke therefor; and Fig. 4 is a sectional view on the line 4-4 of Fig. 1, looking in the direction of the arrows.

The casing is in the form of a shell, consisting of two parts, one of Which is the part 5 referred to for convenience as the body portion, and supported therewithin are the various parts of the X-ray circuit, including the X-ray tube B, transformers 1 and filament transformer 8, these electric elements being suitably connected by circuit wiring of conventional form which is omitted for simplicity in illustration.

Secured at the lower, or open end of the body portion 5 oi the casing is a reinforcing bar 9 to which a ring Ii) is attached by screws II, said screws extending upwardly through the laterally extending peripheral flange I2 provided on the ring. A gasket or washer I3 is located between the ilange I2 and bar 9 to form a liquid-tight joint therebetween.

Secured to a laterally extending flange I4 at the lower end of the ring I!) is a closure plate I5. Screws I6 attach plate I5 to the flange I4 formed on the ring, and gasket I1 is interposed between flange I4 and plate I5 to produce a liquid-tight joint. With the arrangement described, it will bev seen that the lower end of body portion 5 of the casing is closed by means of the ring I5 and 4its co-opcrating closure plate I5 so that the body portion 5 of the casing and co-operating parts Il) and I5 form a liquid-tight chamber which may contain oil in which the various parts of the X- ray apparatus are immersed. Plate I5 is provided with a boss I8 threaded internally to receive locking ring I9 which holds the window 20 in place. The external threads on the boss I8 receive threaded bushing 53 and the threaded cone 211. Bushing 5G holds the lower or bottom member 2l of the casing in place. 5

By removing the cone 20 and bushing 50, the lower member 2| of the casing may be removed, and by removing screws II, the ring I0 and the attached plate I5 may be easily removed, this action removing all of the circuit elements, including transformers 1 and 8 and the X-ray tube 6 also, which is secured to plate I5 by the clamps 22.

The transformers 1 and 8. are supported within body portion 5 by brackets 23 resting and secured upon the ange I2 on ring I0 by means of screws 24 (see Fig. 2). The upper end of these brackets are secured to the transformers by the bolts 25 and bolts 26 secure the filament transformer 8 to several of said brackets. 20

Extending from the opposite ends of the body portion 5 at diametrically opposite points are hollow trunnions 21 which fit within the bearings 23 and are capable of rotary or oscillatory movement therein. Bearings 28 -are formed on 25 the ends of a casing-supporting bracket in the form of a yoke 29, which consists of two halves secured together at a central point by the bolts 30. The yoke is held in a suitable bracket 3| which is provided with holes 32 for reception of 30 screws or other fastening means intended to attach it to a suitable support. The two halves of the yoke 29 are hollow as shown in Figs. 1 and 2, and thus form conduits for wires 33 which lead into the bearings 28 and trunnions 21 mounted therein, and are coiled or pig-tailed as shown at 34 in Fig. l, with their ends attached to binding posts 35 located within the hollow trunnions 21 and extending through the walls of body portion 5. Binding posts 35 are insulated from the walls of body portion 5, from the Walls of trunnions 21 and from the bearings 28, as clearly seen in Figs. 1 and 4. The inner ends of the binding posts 35 are provided with heads 36 forming electrical contact surfaces against which 45 the free ends of leaf spring contacts 31 bear. The upper ends of the spring contacts 31 are secured by screws 39 to the insulated block 38 and wires leading from the screws 39 electrically connect contacts 31 to the transformer 1 and lament transformer 8. Each of the trunnions 21 is provided with a centrally located projecting stud 40 and a screw 4! extending into the end of said stud 40 attaches a cover plate 42 to the stud, said cover plate tting into the end of the bearing 28 and closing the same. The cover plate is calibrated as indicated in Fig. 3 and a fixed pointer 43 is provided on the adjacent arm of the yoke, as clearly shown in Fig. 3, to indicate the degree of inclination of the casing with re- 60 spect to the supporting yoke, when the casing is tilted during use of the apparatus.

It will be seen from the foregoing that all contacts, electrical wiring and parts of the apparatus are completely enclosed in a protective, liquidtight, tiltable casing which holds the parts of the circuit immersed in oil. The manner of mounting the casing is such that it is freely pivotal in the supporting yoke 2S. All electrical contacts are fixed, there being no wiping movement or any relative movement of parts of the circuit with respect to one another during pivotal or tilting movement of the casing relative to the supporting yoke 29. The pig-tailing of the Wires 33 within the sockets 28 permits the pivotal movement of casing to any required extent without imparting strain on the wires or requiring sliding movement of contact members, and a compact, safe and thoroughly reliable structure results. Since the transformers and tube are attached to the cover plate, composed of ring I and attached plate I5, these parts are removable with the cover plate as a unit and when replaced, springs 31, being brought into contact with members 35 at once place the parts in circuit.

What I claim is:

1. In an apparatus of the character described, a casing having a body portion containing oilimmersed' X-,ray circuit elements, a supporting bracket in which said casing is pivotally mountnions and extending into the casing and wiring extending through the bracket and entering the bearings and connected with the contacts located in the trunnions.

2. lIn an apparatus of the character described, a casing having a body portion containing oilimmersed X-ray circuit elements, a yoke in which the casing is pivotally mounted, said yoke having bearings at its ends, hollow trunnions at diametrically opposite points on the casing located within the bearings, electrical contacts located within the trunnions and insulated therefrom, said contacts having their inner ends disposed within the casing and connected to apparatus located therein, and wiring extending through the yoke and entering the bearings and extending Vinto the trunnions and being connected to the electrical contacts located therein.

3. In an apparatus of the character described, a casing containing X-ray apparatus, said casing having hollow trunnions, electrical contact members located in the trunnions and projecting Within' the casing, a hollow yoke in which the trunnions are pivotally mounted, and electrical wiring extending through said yoke and enter-Y ing the trunnions and connected to the contact members located therein.

4. In an apparatus of the character described, a casing containing oil-immersed X-ray apparatus, said casing having a body portion, a cover plate closing said body portion and forming a liquid-tight joint therewith, X-ray Aapparatus se-V cured Vto said cover plate and removable out o1 casing as a unit with the cover plate when said cover plate is removed, trunnionsprojecting from the body portion, a supporting yoke in which said trunnions are pivotally mounted, electrical contact members projecting from within the casing and extending'into the trunnions, wiring extending through the yoke and connected to the contact members, and spring contact ngers carried by the X-ray apparatus for establishing electrical contact with the inner ends of the contact members within the casing.

5. In an apparatus of the character described, a casing containing oil-immersed X-ray apparatus, said casing having hollow trunnions, electrical Contact members located in Said trunnions and projecting into the casing, a hollow yoke having bearings at its ends in which the trunnions are pivotally mounted, electrical wiring extending through said yoke and bearings and entering the trunnions and connected to the contact members located therein, a cover plate on the casing, X-ray apparatus mounted on said plate, and spring ngers carried with saidl apparatus for establishing electrical contact with the parts oi' the contact members located within the casing.

6. In an apparatus of the character described, a casing containing X-ray apparatus, a hollow yoke in which the casing is pivoted, electrical contact members enclosed in the casing pivots, wires extending through the hollow yoke and connected to the contact members, a cover plate for the casing on which the X-ray apparatus is mounted, and spring contact members carried by the apparatus for establishing contact with the first-mentioned contact members inside of the casing when the cover is put in place on the casing and the apparatus carried thereby is moved into position within the casing.

7. An apparatus of the character described comprising, a hollow yoke-shaped bracket having bearings at its ends, a casing containing oil-immersed X-ray apparatus, said casing having trunnions pivotally mounted in said yoke, electrical contact members extending through the casing walls and projecting into the trunnions, means for removably closing the outer sides of the bearings and trunnions, wiring extending through the hollow yoke and entering into the bearings and trunnions, said wiring having slack portions located in the trunnions, the ends of said slack portions being connected to the contact members within the trunnions, a cover plate for the casing, X-ray apparatus carried by said plate and removable from the casing as a unit with said plate, and contact fingers carried with the apparatus for contacting with the parts of the contact members located within the casing when the cover plate and apparatus carried thereby are put in place on and within the casing respectively.

8. In an apparatus of the character described, a casing containing oil-immersed X-ray apparatus, a hollow two-part yoke in which the casing is pivoted, electrical contact members enclosed in the casing pivots, wires extending through the hollow yoke and connected to the contact members and having slack portions located within the pivots, a cover plate for the casing on which the X-ray apparatus is mounted, and spring contact members carried by the apparatus for establishing contact with the rst mentioned contact members inside of the casing when the cover is placed on the casing and the apparatus carried thereby is placed in position within the casing.

HARRY F. WAITE. 

